Shopping security
It consists of a closed transparent box with a transparent tube through the center. The box contains iron filings and silicon oil.
When one or more cylindrical magnets are inserted into the central tube, the filings are attracted and line up along the field lines in all dimensions. One cylindrical magnet is included

Ships within 48 hours · Estimated delivery Jul 21 - Jul 26
US$40
Get nowSign up to your membership to get coupons up to
15%
Get nowOpportunity to enjoy order discount up to 15% off
Top-Converting Item to Boost Your Average Order